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Forum: 66-67 GTO Tempest & LeMans TECH 01-22-2023, 05:56 AM
Replies: 13
Views: 1,972
Posted By Kenth
1963 and earlier 389 blocks wont hold the...

1963 and earlier 389 blocks wont hold the starter.
1964-66 389īs may be bored out to 400 std.

400īs is still plentiful, 389īs is not.
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